P-wave tomography and relation between shallow and deep structures beneath the Songliao basin

查看全文 作　　者：Qiyan [1,2]Yang;Qingju [2]Wu;Xiaojun [2,3]Ma;Fengxue [2]Zhang;Yanrui [1]Sheng

机构地区：[1]Earthquake Administration of Hebei Province;[2]Institute of Geophysics,China Earthquake Administration;[3]Earthquake Administration of Ningxia Autonomous Region

出　　处：《Earthquake Science》索引2015年第28卷第4期,共9页

基　　金：supported by the National Natural Science Foundation of China (Grant No.41274088);International Science and Technology Cooperation Program of China(ISCTP)(Grant No.2011DFB20210);the Earthquake Science and Technology Spark Plan Project of Hebei province,China(Grant NO.DZ20150420030) 摘　　要：We selected relative travel-time residuals from teleseismic waveform data using the waveform correction method and imaged the P wave velocity structure beneath Northeast China.In combination with other geophysical data,we discussed the relation between the shallow and deep structures of the area.The results show that there is a primary high-velocity zone with some high- and low-velocity distribution characters beneath the Songliao basin.The low-velocity anomalies may extend down to the upper mantle,and may be the result of material upwelling.The low-velocity anomaly beneath the southern part of the Songliao basin is connected to those beneath the Changbaishan and A'ershan volcanic areas.It may be an upwelling channel from the mantle beneath the Songliao basin and adjacent area.This finding indicates the Songliao basin was a result of asthenospheric upwelling caused by subduction of the Pacific plate under the Eurasian plate. 关键词：松辽盆地南部 P波速度结构层析成像深层结构浅层地球物理资料波形数据地幔上涌

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P-wave tomography and relation between shallow and deep structures beneath the Songliao basin

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